Much of the current posture of the UK Government is based on the default action enshrined in the European Withdrawal act, that at the end of the Article 50 period the UK leaves the European Union with or without an agreement.
This was changed previously to move that date from March to October, after MPs opposed to Theresa May's deal passed legislation forcing her to seek an extension.
Given that it is this default position that has led to discussion around proroguing parliament, and other quite extreme solutions, is it possible for MPs to pass legislation to change this default position from "No Deal" to revocation of Article 50? Thus putting the onus on the Government to get an acceptable deal through the house?